There is a line of research by the name "Algebraic Graph Theory" but I never heard about "Algebraic Numerical Analysis". Maybe you could start the latter one. So, it will help to learn graph theory; however, I assume you have also come across basic numerical analysis such as locating roots, interpolation, finite differences, Newton-Raphson Method, Gauss Siedel method, etc. If so, you should be able to decide by yourself.